US4252369A - Device for arresting a backrest of a vehicle seat - Google Patents

Device for arresting a backrest of a vehicle seat Download PDF

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Publication number
US4252369A
US4252369A US06/009,696 US969679A US4252369A US 4252369 A US4252369 A US 4252369A US 969679 A US969679 A US 969679A US 4252369 A US4252369 A US 4252369A
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US
United States
Prior art keywords
pawl
backrest
arresting
retaining member
stop member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US06/009,696
Other languages
English (en)
Inventor
Bernd Kluting
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Keiper Automobiltechnik GmbH and Co KG
Original Assignee
Keiper Automobiltechnik GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Keiper Automobiltechnik GmbH and Co KG filed Critical Keiper Automobiltechnik GmbH and Co KG
Application granted granted Critical
Publication of US4252369A publication Critical patent/US4252369A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/42—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats
    • B60N2/433—Safety locks for back-rests, e.g. with locking bars activated by inertia
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/20—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being tiltable, e.g. to permit easy access
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/22—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/42—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats
    • B60N2/4207—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats characterised by the direction of the g-forces
    • B60N2/4214—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats characterised by the direction of the g-forces longitudinal
    • B60N2/4221—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats characterised by the direction of the g-forces longitudinal due to impact coming from the front
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T292/00—Closure fasteners
    • Y10T292/08—Bolts
    • Y10T292/1043—Swinging
    • Y10T292/1075—Operating means
    • Y10T292/1083—Rigid
    • Y10T292/1092—Swinging catch

Definitions

  • This invention relates generally to reclinable vehicle seats, and more particularly it relates to a device for a releasable arresting of a forwardly tiltable backrest of a vehicle seat.
  • the arresting device is of the type which includes an arresting pawl pivotably supported on the seat part of the vehicle seat and engaging from behind a stationary stop connected to the seat part and being releasable from its arresting position if desired.
  • an angularly adjustable and arrestable hinged mount is arranged between the backrest and the seat part.
  • the hinged mount part assigned to the seat part is pivotably supported on pins projecting from the seat part, whereby the other hinged mount part is rigidly connected to the backrest so that the entire hinged mount unit together with the backrest is tiltable about the pin.
  • the lower edge of the hinged part which is pivotably connected to the seat part bears against a stop member such as a tubular member transversing the seat part or its carrier, for example. In this manner the forces occurring during the normal usage of the seat, that means the pressures acting against the backrest part opposite the travel direction are intercepted.
  • the hinged mount part pivotably connected to the seat part is secured in its normal position by means of an arresting pawl which is hinged to the pivotable mount.
  • This locking or arresting pawl during the normal use of the vehicle seat engages from behind a peripheral portion of the stop member which is located opposite the contact zone of the lower hinged mount.
  • the arresting pawl defines a mouth having negatively sloping starting surfaces which enable both the free pivotable movement of the arresting pawl and its transition into a locking or an arresting position.
  • the rear side of the latter opposite the bottom of its mouth is counteracted by a reinforcing cam which is pivotably supported on a pin attached to the hinged mount part connected to the seat part.
  • a cam follower which can also be tiltably supported on the same pin as the reinforcing cam is coupled to this cam.
  • the cam follower is spring loaded and is controllable by means of a Bowden wire and, by means of a shiftable handle arranged on the backrest, can be tilted into a released position.
  • the vertical dimension of the section of the arresting pawl which is susceptible to breakage has to be dimensioned such as to withstand excessive loads and consequently a too large size of this pawl results.
  • too many components have to be employed for creating the arresting pawl which is capable of assuming its ready-to-close position when it is in its released position and which is reinforced in its arresting position.
  • Another object of this invention is to provide such an improved arresting device which requires fewer component parts than conventional devices of this type and which can be economically manufactured.
  • Still another object of this invention is to provide such an improved arresting pawl which in its arresting position is reinforced from different sides.
  • one feature of the invention resides in the provision of a hook-shaped holding member pivotably mounted on the hinged mount, the holding member being engageable with a retaining claw of the hook-shaped pawl which is also tiltably mounted on the hinged mount at the opposite side of the stop member projecting from the seat.
  • the arresting pawl arranged in accordance with this invention can be dimensioned to be weaker than conventional pawls of this type.
  • the mouth of the latter has a negatively curved, outwardly increasing introduction region. Due to the positively defined engagement of the tip claw of the pawl with the holding member, the pawl is held in its arresting position on the stop member irrespective from the frictional moment normally securing this arresting position.
  • a reliable holding of the hook-shaped arresting pawl in its engaged position with the stop member is attained by shaping the tip of the outer arm of the hook as a claw which engages the correspondingly shaped nose on the holding member when the latter is in its arresting position.
  • the arresting pawl has, according to still another feature of this invention, a projecting finger which in the open position of the arresting pawl rests on the stop member, whereby the arresting pawl is spring-biased towards its open position and the hook-shaped holding member is spring-biased towards its closing position.
  • the holding member is brought into its releasing position by means of a manually operated releasing lever.
  • the latter is pivotably supported on the mount opposite one side of the stop member when viewed in the longitudinal direction of the seat and the holding member together with the releasing lever are arranged on the lower hinged mount of the backrest on the other side of the stop member.
  • the ready-to-close or the standby position of the arresting pawl is achieved by very simple means, in such a manner that the biasing spring for the pawl and for the holding member is a spiral spring extending between one arm of the pawl and the releasing lever for the holding member.
  • the aforedescribed arresting device of this invention can be arranged on a mount in the form of a fish plate rigidly connected to the backrest and tiltably supported on the seat part. It is advantageous, however, when an adjustable and arrestable two-piece hinged mount is employed between the seat part and the backrest part of the vehicle seat.
  • This hinged mount has an upper mount part which is rigidly connected to the backrest and a lower mount part pivotably supported from the latter.
  • the arresting pawl is pivotably arranged on one pivot pin, whereas the holding member and the releasing lever are supported for pivotal movement on another pivot pin on the lower mount part.
  • the pivot pin of the arresting pawl is spring loaded by a resilient element secured to the lower hinged mount so that in the case when the adjoining seat is unoccupied and its backrest is unloaded, any rattling noises resulting from the manufacturing tolerances of the device of this invention are eliminated.
  • FIG. 1 shows schematically a side view of a vehicle seat including the arresting device of this invention
  • FIG. 2 shows on an enlarged scale the hinged mount of the backrest of FIG. 1 including on its lower hinged mount part the arresting device;
  • FIG. 3 shows the position of the arresting device of FIG. 2 immediately after its release by a releasing lever
  • FIG. 4 is the arresting device of FIGS. 2 and 3 in its fully open position in which forward tilting of the backrest is possible.
  • the motor vehicle seat as illustrated by way of an example in FIG. 1 consists of a seat part 10 and a backrest 11. On each side of the seat between the seat part 10 and the backrest 11 there is arranged a hinged mount 12 having a lower mount part 13 which is pivotably supported on a pin 14 fixed to the seat part 10, whereas the upper mount part 15 is fixedly connected to the backrest 11.
  • the lower mount part 13 and the upper mount part 15 are tiltably connected one to the other.
  • the mutual position of the two mount parts is determined by means of an adjusting and arresting device which can be in the form of wobble gears for example; controlled, for example, by means of a manipulation handle 16.
  • Backrest 11 is tiltable forwardly above the seat part 10 so that particularly in the case of two-door motor vehicles, the user has an easier access to the rear compartment of the vehicle.
  • This access is preferably made without changing the reclined position of backrest 11 adjusted by means of the aforementioned adjusting and arresting device on the upper mount part 12 so that the backrest upon its return into its normal position has the same inclination and need not be readjusted by means of manipulating handle 16.
  • both mount parts are rigidly held together by means of the arresting mechanism of the adjustment device to form a rigid unit 12 which is tiltable together with the backrest 11 about pivot pin 14 projecting from the supporting frame of the seat part 10.
  • a hook-shaped arresting pawl 18 is provided which is pivotably supported on a pivot pin 19 on the lower mount part 13.
  • the pivot 19 in the lower mount part 13 is situated in the range between the pivot pin 14 for pivotably supporting the lower mount part 13 and the stop member 17, that means it projects immediately in front of the stop member 17.
  • the arresting pawl 18 defines a hook-shaped or U-shaped portion defining a lower arm 20.
  • This U-shaped portion engages the stop member 17 in such a manner that it is swingable in rearward direction to attain its arresting position.
  • the other arm of the U-shaped portion of arresting pawl 18 forms a projecting finger 21 exceeding the top part of stop member 17 so that the finger 21 together with arm 20 form the arms of the U-shaped portion or the mouth of the arresting pawl 18.
  • the free end of lower arm 20 is shaped into a retaining claw 22 which in the arresting position of the pawl 18 is in engagement with a corresponding nose 24 of a safety hook 23 functioning as a holding member for the arresting pawl.
  • the safety hook 23 is also pivotably supported on an axial pin 25 projecting through lower mount parts 13. The pivot pin 25, however, is supported on mount part 13 behind the stop member 17.
  • Pivot pin 25 also pivotally supports a releasing lever 26 which is fixedly secured to safety hook 23 by means of a connecting pin 27.
  • the releasing lever 26 is provided with a manipulation arm 28 which is operatively coupled by means of a Bowden wire 30, for example, to a control lever 29 arranged at the upper part of the backrest 11.
  • the releasing lever 26 has at its upper section a recess 31 surrounding a stop pin 32 projecting from the lower mount part 13 and limiting by its stop surfaces 33 and 34 which cooperate with the stop pin 32, the travel of the safety or retaining hook 23.
  • Below the pivot pin 25 of the hook 23 there is provided an abutment 35 secured to one end of a spring 36 which urges the releasing lever 26 together with the safety hook 23 in closing direction.
  • the arresting pawl 18 has also above its pivot pin 19 a mounting pin 37 to which the other end of the spring 36 is fastened.
  • Spring 36 biases both the abutment 35 of the releasing lever 26 and the mounting pin 37 of the arresting pawl 18.
  • Spring 36 in this case is in the form of a spiral spring.
  • An additional bearing pin 38 is arranged between pivot pins 19 and 25 projecting from the lower mount part 13.
  • the bearing pin 38 supports a spring element 39 which is preferably in the form of a torsional coil spring, one free arm of which rests on the lower mount part 13 and the other arm thereof bearing against the pivot pin 19 to eliminate rattling noises of the arresting mechanism which may be caused by the play resulting from manufacturing tolerances for example.
  • the tension spring 36 keeps pawl 18 turning clockwise until the pawl takes a standby position as illustrated in FIG. 4.
  • the finger 21 of pawl 18 slides on the upper surface of tubular stop member 17, whereas the claw 22 of arm 20 is displaced upwardly at a distance from the stop 17.
  • this standby position makes it possible to tilt backrest 11 together with hinged mounts 13 and 15 about pivot pin 14 in forward direction above the seat part 10.
  • tension spring 36 urges releasing lever 26 together with the retaining hook 23 clockwise to resume their initial position in which stop surface 33 of releasing lever 26 abuts against stop pin 32.
  • Retaining hook 23 resumes again its ready-to-close position.
  • backrest 11 with its hinged mount 12 is tilted from its forwardly inclined position indicated by dash-dot lines in FIG. 1 into its normal position, it is the projecting finger 21 which first contacts stop member 17.
  • the contact edge of finger 21 is shaped so as to urge pawl 18, in the course of the further downward movement of the lower mount part 13, counterclockwise upwardly until its U-shaped portion abuts against the stop member 17 and claw 22 displaces the spring-biased retaining hook 23 and snaps into engagement with its nose 24, thus resuming its arresting position as illustrated in FIG. 2.
  • the retaining hook 23 insures again a reliable arresting function of pawl 18 and only upon the repeated actuation of operating lever 29 the pawl can be released again.

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Seats For Vehicles (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
US06/009,696 1978-02-17 1979-02-05 Device for arresting a backrest of a vehicle seat Expired - Lifetime US4252369A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19782806771 DE2806771A1 (de) 1978-02-17 1978-02-17 Vorrichtung zur verriegelung der rueckenlehne eines fahrzeugsitzes
DE2806771 1978-02-17

Publications (1)

Publication Number Publication Date
US4252369A true US4252369A (en) 1981-02-24

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ID=6032228

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/009,696 Expired - Lifetime US4252369A (en) 1978-02-17 1979-02-05 Device for arresting a backrest of a vehicle seat

Country Status (3)

Country Link
US (1) US4252369A (enrdf_load_stackoverflow)
DE (1) DE2806771A1 (enrdf_load_stackoverflow)
FR (1) FR2417410A1 (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4635454A (en) * 1984-11-19 1987-01-13 Avis Industrial Corporation Latch gear lock assembly
US4773693A (en) * 1987-03-13 1988-09-27 Canadian A.S.E. Limited Seat release mechanism
US20040066077A1 (en) * 2001-11-22 2004-04-08 Keiper Gmbh & Co. Kg Adjuster for a vehicle seat
US6832815B2 (en) * 2002-09-25 2004-12-21 Lear Corporation Seatback dump latch
US6880888B2 (en) * 2001-03-31 2005-04-19 Keiper Gmbh & Co. Kg Fitting for a vehicle seat
US20200148084A1 (en) * 2018-11-08 2020-05-14 Polaris Industries Inc. Latching System for a Vehicle Seat
CN111938357A (zh) * 2019-05-16 2020-11-17 李万山 一种腰部运动保健椅

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4294488A (en) * 1979-11-23 1981-10-13 Ferro Manufacturing Corporation Recliner and inertia latch
DE3247946A1 (de) * 1982-12-24 1984-07-05 Keiper Automobiltechnik Gmbh & Co Kg, 5630 Remscheid Gelenkbeschlag fuer fahrzeugsitze
DE3504166C2 (de) * 1985-02-07 1994-03-31 Keiper Recaro Gmbh Co Vorrichtung zur lösbaren Verriegelung eines mit dem Sitzteil eines Fahrzeugsitzes vorschwenkbar verbundenen Lehnenteiles
DE3506540A1 (de) * 1985-02-25 1986-08-28 P.A. Rentrop, Hubbert & Wagner Fahrzeugausstattungen Gmbh & Co Kg, 3060 Stadthagen Gelenkbeschlag fuer nach vorn umlegbare rueckenlehnen von kraftfahrzeugsitzen
DE3633826A1 (de) * 1986-10-04 1988-04-14 Daimler Benz Ag Sitz in einem zwei gegenueberliegend angeordnete seitentueren aufweisenden kraftwagen
FR2621281B1 (fr) * 1987-10-06 1990-01-19 Faure Bertrand Automobile Perfectionnements aux sieges de vehicule a dossier reglable
JPH0723319Y2 (ja) * 1990-05-25 1995-05-31 池田物産株式会社 シートベルトのベルトアンカーの取付構造
US5810444A (en) * 1995-12-14 1998-09-22 Trw Vehicle Safety Systems Inc. Seat latch blockout mechanism

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3305258A (en) * 1964-12-07 1967-02-21 L W Menzimer Automotive door latch
US3384404A (en) * 1966-04-21 1968-05-21 L W Menzimer Vehicle door latch
US3410600A (en) * 1966-02-01 1968-11-12 Ford Motor Co Locks
DE1555857A1 (de) * 1965-10-02 1970-07-02 Happich Gmbh Gebr Sitz,insbesondere fuer Kraftfahrzeuge
US3635525A (en) * 1969-08-25 1972-01-18 Gen Motors Corp Vehicle seat having an adjustable back
DE2326808A1 (de) * 1972-05-25 1973-12-06 Lectron Products Verschluss, insbesondere fuer einen kraftfahrzeugdeckel
DE2441398A1 (de) * 1974-08-29 1976-03-11 Volkswagenwerk Ag Einrichtung zum verriegeln und entriegeln insbesondere eines am fahrzeugaufbau eines kraftfahrzeuges angeordneten fahrzeugsitzes
DE2514819A1 (de) * 1975-04-04 1976-10-21 Keiper Kg Fahrzeug- insbesondere kraftwagensitz

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3305258A (en) * 1964-12-07 1967-02-21 L W Menzimer Automotive door latch
DE1555857A1 (de) * 1965-10-02 1970-07-02 Happich Gmbh Gebr Sitz,insbesondere fuer Kraftfahrzeuge
US3410600A (en) * 1966-02-01 1968-11-12 Ford Motor Co Locks
US3384404A (en) * 1966-04-21 1968-05-21 L W Menzimer Vehicle door latch
US3635525A (en) * 1969-08-25 1972-01-18 Gen Motors Corp Vehicle seat having an adjustable back
DE2326808A1 (de) * 1972-05-25 1973-12-06 Lectron Products Verschluss, insbesondere fuer einen kraftfahrzeugdeckel
DE2441398A1 (de) * 1974-08-29 1976-03-11 Volkswagenwerk Ag Einrichtung zum verriegeln und entriegeln insbesondere eines am fahrzeugaufbau eines kraftfahrzeuges angeordneten fahrzeugsitzes
DE2514819A1 (de) * 1975-04-04 1976-10-21 Keiper Kg Fahrzeug- insbesondere kraftwagensitz

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4635454A (en) * 1984-11-19 1987-01-13 Avis Industrial Corporation Latch gear lock assembly
US4773693A (en) * 1987-03-13 1988-09-27 Canadian A.S.E. Limited Seat release mechanism
US6880888B2 (en) * 2001-03-31 2005-04-19 Keiper Gmbh & Co. Kg Fitting for a vehicle seat
US20040066077A1 (en) * 2001-11-22 2004-04-08 Keiper Gmbh & Co. Kg Adjuster for a vehicle seat
US6902237B2 (en) * 2001-11-22 2005-06-07 Keiper Gmbh & Co. Kg Adjuster for a vehicle seat
US6832815B2 (en) * 2002-09-25 2004-12-21 Lear Corporation Seatback dump latch
US20200148084A1 (en) * 2018-11-08 2020-05-14 Polaris Industries Inc. Latching System for a Vehicle Seat
US10889222B2 (en) * 2018-11-08 2021-01-12 Polaris Industries Inc. Latching system for a vehicle seat
CN111938357A (zh) * 2019-05-16 2020-11-17 李万山 一种腰部运动保健椅

Also Published As

Publication number Publication date
DE2806771A1 (de) 1979-08-23
FR2417410B1 (enrdf_load_stackoverflow) 1982-11-19
FR2417410A1 (fr) 1979-09-14
DE2806771C2 (enrdf_load_stackoverflow) 1988-02-25

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